1091247134 has 4 divisors (see below), whose sum is σ = 1636870704. Its totient is φ = 545623566.

The previous prime is 1091247133. The next prime is 1091247139. The reversal of 1091247134 is 4317421901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4317421901 = 13 ⋅332109377.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1091247134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091247133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272811782 + ... + 272811785.

It is an arithmetic number, because the mean of its divisors is an integer number (409217676).

Almost surely, 2^1091247134 is an apocalyptic number.

1091247134 is a deficient number, since it is larger than the sum of its proper divisors (545623570).

1091247134 is an equidigital number, since it uses as much as digits as its factorization.

1091247134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545623569.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1091247134 is about 33034.0299388373. The cubic root of 1091247134 is about 1029.5348180609.

The spelling of 1091247134 in words is "one billion, ninety-one million, two hundred forty-seven thousand, one hundred thirty-four".